Lots of stuff. My kids come home starving and we don't have dinner til 7.30 when DH gets home. They have cereal, toast, maybe a sandwich or leftovers. DS1-12 often has a small tin of beans on toast. Otherwise, they have a bag of crisps or maybe some biscuits (which I rarely have in). There is always fruit and they may eat that if it's only an hour or two til dinnertime and they claim starvation.